A compass, I learnt when I was surveying, it'll... it'll point you True North from where you're standing, but it's got no advice about the swamps and deserts and chasms that you'll encounter along the way.
D'una brúixola, vaig aprendre quan estava estudiant, que ... si se li indica com a veritable Nord on estàs parat, no et adverteix sobre els pantans deserts i abismes que trobaràs en el camí.